Real‐time predictive control‐based anti‐pitching method for high‐speed multihull with appendages constraints

2022 ◽  
Author(s):  
Guosheng Li ◽  
Jun Zhang ◽  
Zhilin Liu ◽  
Haojun Hu ◽  
Linhe Zheng
Keyword(s):  
Real Time ◽  
Predictive Control ◽  
High Speed

Active Predictive Control Applied to Suppress Dynamic Vibration Responses of Elastic Linkage Mechanisms With Piezoelectric Actuators and Sensors

Volume 1 ◽  
2004 ◽  
Author(s):  
Pengfei Li ◽  
Hongzhao Liu
Keyword(s):  
Real Time ◽  
Predictive Control ◽  
High Speed ◽  
Piezoelectric Actuators ◽  
Elastic Vibration ◽  
Dynamic Responses ◽  
Linkage Mechanism ◽  
Dynamic Vibration ◽  
Vibration Responses ◽  
Piezoelectric Actuators And Sensors

An approach for suppressing elastic vibration responses of high-speed elastic linkage mechanisms with piezoelectric actuators and sensors was proposed using the active predictive control strategy. Based on the time-varying dynamic differential equation of a linkage mechanism, the discrete time state space equation was established, and the prediction model was formulated explicitly to express the dynamic responses of the mechanism. The weighted difference between predictive outputs and desired outputs was as the objective function, and the minimization of control energy was as the constraint condition. The model predictive control algorithm with real-time error prediction estimation was employed to suppress the dynamic vibration of the mechanism. The simulation results of the proposed method indicated that applying the simple predictive model of the controlled mechanism, the active prediction controller could be designed to suppress elastic vibration responses of linkage mechanisms efficiently, and meet the real-time demand of the system control.

Real-Time Optimal Speed Coordination and Scheduling for High-Speed Trains Based on Model Predictive Control

2012 ◽  
Vol 433-440 ◽  
pp. 6043-6048 ◽  
Author(s):  
Yong Hua Zhou ◽  
Yang Peng Wang ◽  
Pin Wu ◽  
Peng Wang
Keyword(s):  
Model Predictive Control ◽  
Real Time ◽  
Predictive Control ◽  
Mobile Communications ◽  
High Speed ◽  
Real Time Processing ◽  
Optimal Speed ◽  
Simulation Speed ◽  
High Speed Trains ◽  
Time Optimal

In the high-speed train control system, the command information such as allowable running distance, time and speed can be sent by the global system for mobile communications for railways (GSM-R). This paper will propose the framework of real-time train scheduling and control based on model predictive control for the optimal speed set-points of high-speed trains. The rolling optimization process combines the genetic algorithm with the simulation of train operation to evaluate the performance of speed set-points, which can be easily implemented in the parallel computing environment for real-time processing. The conflict resolution at the crossing stations is modeled by and embedded in the combination of various speed set-points which are formed from virtual to simulation speed. The final actual speed of train is engendered based on the movement authority and running time through the system of automatic train protection (ATP). The simulation results demonstrate the favorable performance of proposed method.

Coordinated Control among High-Speed Trains Based on Model Predictive Control

2011 ◽  
Vol 467-469 ◽  
pp. 2143-2148 ◽  
Author(s):  
Yong Hua Zhou ◽  
Yang Peng Wang
Keyword(s):  
Model Predictive Control ◽  
Real Time ◽  
Predictive Control ◽  
High Speed ◽  
Prediction Models ◽  
Coordinated Control ◽  
Optimization Approach ◽  
High Speed Trains ◽  
Railway System ◽  
Real Time Information

In the high-speed train control system, it is possible to realize the mutual real-time communication between trains and ground equipments, thus the real-time information about trains can be transmitted to the ground commanding center. Under this new operation paradigm, in order to improve its safety and efficiency, this paper proposes the generalized and hierarchical framework of model predictive control (MPC) for the railway system including macroscopic, mesoscopic and microscopic levels. Under this framework, this paper further elaborates the coordinated following control based on MPC among adjacent trains in order to guarantee proper safety distance in case of unexpected disturbances. The Levenberg-Marquardt optimization approach is utilized to engender the corresponding control commands. The simulation results demonstrate the efficiency and robustness of MPC with the prediction models of trains’ movement for the coordinated control among them.

High speed interferometric device for real-time correction of aero-optic effects

1995 ◽  
Author(s):  
Rod Clark ◽  
John Karpinsky ◽  
Gregg Borek ◽  
Eric Johnson
Keyword(s):  
Real Time ◽  
High Speed ◽  
Time Correction

Electrical Probing and Surface Imaging of Deep Sub-Micron Integrated Circuits

1999 ◽  
Author(s):  
Kenneth Krieg ◽  
Richard Qi ◽  
Douglas Thomson ◽  
Greg Bridges
Keyword(s):  
High Resolution ◽  
Integrated Circuits ◽  
Real Time ◽  
High Speed ◽  
Time Signal ◽  
Surface Imaging ◽  
Atomic Force ◽  
Submicron Structures ◽  
High Resolution Images ◽  
Capacitive Loading

Abstract A contact probing system for surface imaging and real-time signal measurement of deep sub-micron integrated circuits is discussed. The probe fits on a standard probe-station and utilizes a conductive atomic force microscope tip to rapidly measure the surface topography and acquire real-time highfrequency signals from features as small as 0.18 micron. The micromachined probe structure minimizes parasitic coupling and the probe achieves a bandwidth greater than 3 GHz, with a capacitive loading of less than 120 fF. High-resolution images of submicron structures and waveforms acquired from high-speed devices are presented.

Low-Cost High-Speed Techniques for Real-Time Simulation of Power Electronic Systems

2007 ◽  
Author(s):  
R. E. Crosbie ◽  
J. J. Zenor ◽  
R. Bednar ◽  
D. Word ◽  
N. G. Hingorani
Keyword(s):  
Real Time ◽  
High Speed ◽  
Low Cost ◽  
Electronic Systems ◽  
Power Electronic ◽  
Real Time Simulation ◽  
Time Simulation
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